Arcgis for android 如何重写TiledServiceLayer

Question

问题：
     在ArcGIS Runtime SDK for Android10.1版本中怎么样重写TiledServiceLayer，以实现读取自定义的瓦片数据。
我的代码如下：
      package com.esri.arcgis.android.samples.helloworld;import java.io.ByteArrayOutputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import com.esri.android.map.TiledServiceLayer;
import com.esri.core.geometry.Envelope;
import com.esri.core.geometry.Point;
import com.esri.core.geometry.SpatialReference;public class customTiledLayer extends TiledServiceLayer {

public customTiledLayer(String url, boolean initLayer) {
super(url);
// TODO Auto-generated constructor stub'

   Envelope e = new Envelope(96.8064823,25.68096106,109.1252279,34.75215408);
       Envelope fulle = new Envelope(-180,-90,180,90);
       this.setInitialExtent(e);   //初始范围
       this.setFullExtent(fulle);  //最大范围
       
       this.setDefaultSpatialReference(SpatialReference.create(4326));
       
     Point pPoint =new Point(-180,90);
       double [] scale = new double[15];   //比例尺
       double [] res = new double[15];     //分辨率
        scale[0] = 0.0219726567661385;
        res[0] = 9234300;
       for(int i=1;i<15;i++)
       {
        scale[i]=scale[i-1]/2.0;
        res[i]= res[i-1]/2.0;
       }
   TileInfo pTileInfo = new TileInfo(pPoint,scale, res, 15, 96, 256, 256);
   this.setTileInfo(pTileInfo);
   
   //return customTiledLayer.this.getTile(level, row, col)
} protected byte[] getTile(int level, int row, int col) throws Exception
{
byte[] arrayOfByte = null;
    HttpEntity localHttpEntity = null;
    ByteArrayOutputStream localByteArrayOutputStream = null;
try
{
System.out.println("gettiles:col" + String.valueOf(col) + "row" + String.valueOf(row) + "level" + String.valueOf(level));
String cachepath = getUrl() + "/tile" + "/" + String.valueOf(level) + "/" + String.valueOf(row) + "/" + String.valueOf(col);
HttpPost post = new HttpPost(cachepath);

HttpResponse response = new DefaultHttpClient().execute(post);
localHttpEntity = response.getEntity();
localByteArrayOutputStream = new ByteArrayOutputStream();
    localHttpEntity.writeTo(localByteArrayOutputStream);
    arrayOfByte = localByteArrayOutputStream.toByteArray();
    localByteArrayOutputStream.flush();

    return arrayOfByte;
}
catch (Exception e)
{
System.out.println("gettilesfailed:" + e.toString());
throw e;
}
finally
{
if (localByteArrayOutputStream != null)
        localByteArrayOutputStream.close();
    if (localHttpEntity != null) {
        localHttpEntity.consumeContent();
    }
}
}}
但是一直不能出图，请大家帮我看哈，是哪里有问题的哈。谢谢各位大牛了。androidarcgis

Answer 1

我和你的类似，也是不出图啊。不知道楼主是否已经解决问题了。我参考的那个加载天地图的demo，竟然还有一个辅助的jar包文件。发现那个demo很是扯淡。

Answer 2

package com.gtmap.android.hydro.jihua.map;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Random;
import java.util.concurrent.RejectedExecutionException;import android.util.Log;import com.esri.android.map.TiledServiceLayer;
import com.esri.core.geometry.Envelope;
import com.esri.core.geometry.Point;
import com.esri.core.geometry.SpatialReference;
import com.esri.core.io.UserCredentials;/**
 * 天地图
 */
public class TianDiTuTiledMapServiceLayer extends TiledServiceLayer {
    private TianDiTuTiledMapServiceType _mapType;
    private TileInfo tiandituTileInfo;
    public TianDiTuTiledMapServiceLayer() {
        this(null, null,true);
    }
    public TianDiTuTiledMapServiceLayer(TianDiTuTiledMapServiceType mapType){
        this(mapType, null,true);
    }    public TianDiTuTiledMapServiceLayer(TianDiTuTiledMapServiceType mapType,UserCredentials usercredentials){
        this(mapType, usercredentials, true);
    }
    public TianDiTuTiledMapServiceLayer(TianDiTuTiledMapServiceType mapType, UserCredentials usercredentials, boolean flag){
        super("");
        this._mapType=mapType;
        setCredentials(usercredentials);
        
        if(flag)
            try
            {
                getServiceExecutor().submit(new Runnable() {                    public final void run()
                    {
                        a.initLayer();
                    }                    final TianDiTuTiledMapServiceLayer a;            
            {
                a = TianDiTuTiledMapServiceLayer.this;
                //super();
            }
                });
                return;
            }
            catch(RejectedExecutionException _ex) { }
    }
    public TianDiTuTiledMapServiceType getMapType(){
        return this._mapType;
    }
     protected void initLayer(){
         this.buildTileInfo();
         this.setFullExtent(new Envelope(-180,-90,180,90));
//         this.setDefaultSpatialReference(SpatialReference.create(4490));   //CGCS2000
         this.setDefaultSpatialReference(SpatialReference.create(4326)); //GCS_WGS_1984 
//         this.setInitialExtent(new Envelope(90.52,33.76,113.59,42.88));
         this.setInitialExtent(new Envelope(118.91208162289873,28.43301753729623,120.89833669751555,29.7232802677077));
         super.initLayer();
     }
      public void refresh()
        {
            try
            {
                getServiceExecutor().submit(new Runnable() {                    public final void run()
                    {
                        if(a.isInitialized())
                            try
                            {
                                a.b();
                                a.clearTiles();
                                return;
                            }
                            catch(Exception exception)
                            {
                                Log.e("ArcGIS", "Re-initialization of the layer failed.", exception);
                            }
                    }                    final TianDiTuTiledMapServiceLayer a;                
                {
                    a = TianDiTuTiledMapServiceLayer.this;
                    //super();
                }
                });
                return;
            }
            catch(RejectedExecutionException _ex)
            {
                return;
            }
        }
        final void b()
                throws Exception
            {
             
            }    @Override
    protected byte[] getTile(int level, int col, int row) throws Exception {
        /**
         * 
         * */
    
byte[] result = null;
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream(); URL sjwurl = new URL(this.getTianDiMapUrl(level, col, row));
HttpURLConnection httpUrl = null;
BufferedInputStream bis = null;
byte[] buf = new byte[1024]; httpUrl = (HttpURLConnection) sjwurl.openConnection();
httpUrl.connect();
bis = new BufferedInputStream(httpUrl.getInputStream()); while (true) {
int bytes_read = bis.read(buf);
if (bytes_read > 0) {
bos.write(buf, 0, bytes_read);
} else {
break;
}
}
;
bis.close();
httpUrl.disconnect(); result = bos.toByteArray();
} catch (Exception ex) {
ex.printStackTrace();
}

return result;
    }
    @Override
    public TileInfo getTileInfo(){
        return this.tiandituTileInfo;
    }
    /**
     * 
     * */
    private String getTianDiMapUrl(int level, int col, int row){
        
      /**
         * 天地图矢量、影像
         * */
        StringBuilder url=new StringBuilder("http://t");
        Random random=new Random();
        int subdomain = (random.nextInt(6) + 1);
        url.append(subdomain);
        switch(this._mapType){
        case VEC_C:
             url.append(".tianditu.com/DataServer?T=vec_c&X=").append(col).append("&Y=").append(row).append("&L=").append(level);
            break;
        case CVA_C:
          url.append(".tianditu.com/DataServer?T=cva_c&X=").append(col).append("&Y=").append(row).append("&L=").append(level);
            break;
        case CIA_C:
          url.append(".tianditu.com/DataServer?T=cia_c&X=").append(col).append("&Y=").append(row).append("&L=").append(level);
            break;
        case IMG_C:
          url.append(".tianditu.com/DataServer?T=img_c&X=").append(col).append("&Y=").append(row).append("&L=").append(level);
            break;
            default:
                return null;
        }
        return url.toString();
    }
    
    private void buildTileInfo()
    {
        Point originalPoint=new Point(-180,90);        double[] res={
                1.40625,
                0.703125,
                0.3515625,
                0.17578125,
                0.087890625,
                0.0439453125,
                0.02197265625,
                0.010986328125,
                0.0054931640625,
                0.00274658203125,
                0.001373291015625,
                0.0006866455078125,
                0.00034332275390625,
                0.000171661376953125,
                8.58306884765629E-05,
                4.29153442382814E-05,
                2.14576721191407E-05,
                1.07288360595703E-05,
                5.36441802978515E-06,
                2.68220901489258E-06,
                1.34110450744629E-06
        };
        double[] scale={
                400000000,
                295497598.5708346,
                147748799.285417,
                73874399.6427087,
                36937199.8213544,
                18468599.9106772,
                9234299.95533859,
                4617149.97766929,
                2308574.98883465,
                1154287.49441732,
                577143.747208662,
                288571.873604331,
                144285.936802165,
                72142.9684010827,
                36071.4842005414,
                18035.7421002707,
                9017.87105013534,
                4508.93552506767,
                2254.467762533835,
                1127.2338812669175,
                563.616940
        };       
        int levels=21;
        int dpi=96;
        int tileWidth=256;
        int tileHeight=256;
        this.tiandituTileInfo=new com.esri.android.map.TiledServiceLayer.TileInfo(originalPoint, scale, res, levels, dpi, tileWidth,tileHeight);
        this.setTileInfo(this.tiandituTileInfo);
    }    
    public enum  TianDiTuTiledMapServiceType {
     /**
         * 天地图矢量
         * */
     VEC_C,
        /**
         * 天地图影像
         * */
        IMG_C,
        /**
         * 天地图矢量标注
         * */
        CVA_C,
        /**
         * 天地图影像标注
         * */
        CIA_C
    }
}这个是加载天地图的，LZ可能是拼出的那个地址访问不到了吧，你可以试试。